$\begingroup$Are you referring to Saturn V? If that's the case, it would be good to edit both the title and the body. It would also be good to expand the body so that it can be understood without re-reading the title: i.e. title: What function did the ribbed portions on Saturn V exterior serve? Body: I would like to know what function did the ribbed portions on Saturn V exterior serve, such as the the intertank section and forward skirt on Stage 1. Thank you!$\endgroup$
– BlueCoderNov 19 '18 at 13:03